Download SCCS General Physics Chapter 5 STUDY GUIDE Name

SCCS General Physics Chapter 5 STUDY GUIDE
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1. How is the direction of a vector measured, on the x/y coordinate system? (Where would a 0-degree angle be
located? Where would a 120-degree angle be located?)
2. Can you divide a vector by a scalar quantity? Can you add vector and scalar quantities?
3. What is the difference between static and kinetic friction?
4. What factors does the force of friction depend on?
5. Can you add vectors by adding their components?
6. Graphically, how do you add vectors?
7. Joey walks 50 meters west and then 75 meters north. What is his displacement?
8. Define sine, cosine, and tangent.
9. When you multiply a vector by a scalar, what aspects of the vector change?
10. What is the equation for kinetic friction? What is the equation for static friction? How would you define
the coefficient of friction?
11. Define the following forces: gravity, friction, normal, equilibrant
12. Why do ramps and loading docks have no-slip surfaces?
Practice problems:
1. To get a cart to move, two farmers pull on ropes attached to the cart, as shown below. One farmer pulls with
a force of 50.0 N in a direction 35.0 east of north, while the other exerts a force of 30.0 N in a direction 25.0
west of north. What are the magnitude and the direction of the combined force exerted on the cart?
2. A hammer slides down a roof that makes a 32.0 angle with the horizontal. What are
the magnitudes of the components of the hammer’s velocity at the edge of the roof if it is moving at a speed of
6.25 m/s?
3. A child shoves a small toboggan weighing 100.0 N up a hill, giving the toboggan an initial speed of 6.0 m/s.
If the hill is inclined at an angle of 32 above the horizontal, how far along the hill will the toboggan slide?
Assume that the coefficient of sliding friction between the toboggan and the hill is 0.15.
4. Mira received a 235-N sled for her birthday. She takes the sled out to a flat field. When she pushes it with a
45.0-N horizontal force, it slides along at a constant speed. What is the coefficient of kinetic friction between
the coefficient of kinetic friction between the sled and the field?